:root {
  --bg: #06090e;
  --bg-elevated: rgba(15, 23, 42, 0.55);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --accent: #34d399;
  --accent-dim: rgba(52, 211, 153, 0.15);
  --cyan: #22d3ee;
  --border: rgba(148, 163, 184, 0.12);
  --radius: 16px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  /* 落地页：横向边距 + 区块纵向节奏（各 section / cta 上下对称、板块间距一致） */
  --page-x: min(5vw, 2.75rem);
  --section-y: clamp(2.35rem, 5.5vw, 3.25rem);
  --block-gap: clamp(0.85rem, 2vw, 1.15rem);
  --title-to-content: clamp(1rem, 2.4vw, 1.35rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 200;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #042f1e;
  background: linear-gradient(135deg, #5eead4, var(--accent));
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.2s var(--ease-out);
}

.skip-link:focus {
  top: max(0.75rem, env(safe-area-inset-top, 0px));
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.footer-nav {
  margin-bottom: 0.45rem;
}

.footer-contact {
  margin: 0.35rem 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-contact-label {
  display: block;
  margin-bottom: 0.25rem;
}

.card strong {
  color: var(--text);
  font-weight: 600;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem var(--page-x);
  background: linear-gradient(to bottom, rgba(6, 9, 14, 0.92), transparent);
  backdrop-filter: blur(8px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
  cursor: default;
  user-select: none;
}

.logo-mark {
  width: 1.65rem;
  height: 1.65rem;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 6px;
}

.logo-dot {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.25s var(--ease-out);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text) !important;
  background: var(--bg-elevated);
}

.nav-cta:hover {
  border-color: rgba(52, 211, 153, 0.35);
  color: var(--accent) !important;
}

main {
  position: relative;
  z-index: 1;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: clamp(4rem, 10vh, 5rem) var(--page-x) var(--section-y);
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: min(90vw, 720px);
  height: min(60vh, 480px);
  background: radial-gradient(ellipse, rgba(52, 211, 153, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-kicker {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.25rem;
}

.hero-eyebrow {
  margin: 0 auto 0.85rem;
  padding: 0.2em 0;
  font-size: clamp(1.75rem, 6.5vw, 2.85rem);
  font-weight: 800;
  letter-spacing: 0.2em;
  line-height: 1.15;
  background: linear-gradient(105deg, #ecfeff 0%, #5eead4 22%, #34d399 52%, #22d3ee 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 18px rgba(52, 211, 153, 0.55)) drop-shadow(0 0 42px rgba(34, 211, 238, 0.28));
}

@media (prefers-reduced-motion: no-preference) {
  .hero-eyebrow {
    animation: hero-eyebrow-pulse 2.6s ease-in-out infinite;
  }
}

@keyframes hero-eyebrow-pulse {
  0%,
  100% {
    filter: drop-shadow(0 0 14px rgba(52, 211, 153, 0.45)) drop-shadow(0 0 32px rgba(34, 211, 238, 0.2));
  }
  50% {
    filter: drop-shadow(0 0 26px rgba(52, 211, 153, 0.85)) drop-shadow(0 0 56px rgba(34, 211, 238, 0.42));
  }
}

.hero-title {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 auto 1rem;
  max-width: 12ch;
}

.hero-title-accent {
  background: linear-gradient(135deg, var(--cyan), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 第三行「每一场的布局」与渐变字紧排，避免 HTML 空格造成字间大缝 */
.hero-title-line3 {
  display: inline;
}

.hero-mobile-hint {
  display: none;
  margin: 0;
  max-width: 22rem;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--text-muted);
  text-align: center;
}

.hero-lead {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 34rem;
  margin: 0 auto var(--title-to-content);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out), border-color 0.2s, background 0.2s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  color: #042f1e;
  background: linear-gradient(135deg, #5eead4, var(--accent));
  box-shadow: 0 12px 40px -8px rgba(52, 211, 153, 0.45);
}

.btn-primary:hover {
  box-shadow: 0 16px 48px -8px rgba(52, 211, 153, 0.55);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.4);
}

.btn-ghost:hover {
  border-color: rgba(52, 211, 153, 0.35);
  background: var(--accent-dim);
}

.btn-lg {
  padding: 0.85rem 1.65rem;
  font-size: 0.9375rem;
}

.section {
  padding: var(--section-y) var(--page-x);
}

/* —— 桌面端首页：减轻大面积留白、加轻量背景层次与更大字号（≥769px；≤768 与 device-mobile 不变） —— */
@media (min-width: 769px) {
  :root {
    --page-x: min(4vw, 3.25rem);
    --title-to-content: clamp(1.05rem, 2.1vw, 1.45rem);
  }

  .nav {
    padding: 1.05rem max(1.5rem, calc((100vw - 70rem) / 2 + 1rem));
  }

  .logo {
    font-size: 1.2rem;
  }

  .logo-mark {
    width: 1.85rem;
    height: 1.85rem;
  }

  .nav-links {
    gap: 1.5rem;
  }

  .nav-links a {
    font-size: 0.9375rem;
  }

  .hero {
    isolation: isolate;
    min-height: min(92vh, 920px);
    padding-top: clamp(5.25rem, 11vh, 6.75rem);
    padding-bottom: clamp(2.75rem, 7vh, 4.25rem);
    padding-left: max(var(--page-x), calc((100vw - 70rem) / 2 + 1rem));
    padding-right: max(var(--page-x), calc((100vw - 70rem) / 2 + 1rem));
  }

  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
      radial-gradient(ellipse 72% 55% at 50% 38%, rgba(34, 211, 238, 0.07) 0%, transparent 58%),
      radial-gradient(ellipse 58% 48% at 50% 52%, rgba(52, 211, 153, 0.09) 0%, transparent 62%),
      linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
      linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px);
    background-size:
      100% 100%,
      100% 100%,
      80px 80px,
      80px 80px;
    background-position: center, center, center, center;
    -webkit-mask-image: radial-gradient(ellipse 68% 58% at 50% 45%, #000 0%, transparent 78%);
    mask-image: radial-gradient(ellipse 68% 58% at 50% 45%, #000 0%, transparent 78%);
  }

  .hero-glow {
    z-index: 1;
    width: min(88vw, 1020px);
    height: min(64vh, 580px);
    background: radial-gradient(ellipse, rgba(52, 211, 153, 0.17) 0%, rgba(34, 211, 238, 0.07) 42%, transparent 72%);
  }

  .hero-eyebrow,
  .hero-title,
  .hero-lead,
  .hero-actions {
    position: relative;
    z-index: 2;
  }

  .hero-eyebrow {
    font-size: clamp(2rem, 3.5vw, 3.5rem);
    margin-bottom: 1rem;
  }

  .hero-title {
    font-size: clamp(2.45rem, 4.2vw, 4.05rem);
    max-width: 16ch;
    margin-bottom: 1.1rem;
    line-height: 1.08;
  }

  .hero-lead {
    font-size: clamp(1.06rem, 1.35vw, 1.28rem);
    max-width: 42rem;
    line-height: 1.65;
  }

  .hero-actions {
    gap: 1rem;
    margin-top: 0.15rem;
  }

  .hero-actions .btn {
    padding: 0.82rem 1.85rem;
    font-size: 0.9375rem;
  }

  .section {
    padding-left: max(var(--page-x), calc((100vw - 70rem) / 2 + 1rem));
    padding-right: max(var(--page-x), calc((100vw - 70rem) / 2 + 1rem));
  }

  .section-title {
    font-size: clamp(1.65rem, 2.75vw, 2.2rem);
  }

  .section-sub {
    max-width: 38rem;
  }

  .grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(268px, 1fr));
    gap: clamp(1rem, 1.8vw, 1.35rem);
    max-width: 72rem;
    margin-left: auto;
    margin-right: auto;
  }

  .pricing-grid,
  .pricing-grid--two {
    max-width: 72rem;
    margin-left: auto;
    margin-right: auto;
    gap: clamp(1rem, 1.8vw, 1.35rem);
  }

  .cta h2 {
    font-size: clamp(1.65rem, 2.75vw, 2.35rem);
  }
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(15, 23, 42, 0.35));
}

.section-title {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
  text-align: center;
}

.section-sub {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin: 0 auto var(--title-to-content);
  max-width: 32rem;
  line-height: 1.55;
  text-align: center;
}

.grid-3 {
  display: grid;
  gap: var(--block-gap);
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
}

.card {
  padding: 1.25rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  transition: border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.card:hover {
  border-color: rgba(52, 211, 153, 0.2);
  transform: translateY(-2px);
}

.card-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--accent-dim);
  color: var(--accent);
  margin-bottom: 0.65rem;
}

.card-icon svg {
  width: 19px;
  height: 19px;
}

.card h3 {
  font-size: 1.0625rem;
  margin: 0 0 0.35rem;
}

.card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.flow-inner {
  max-width: 36rem;
  margin: 0 auto;
}

.cta {
  position: relative;
  text-align: center;
  padding: var(--section-y) var(--page-x);
  overflow: hidden;
}

.cta-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, rgba(34, 211, 238, 0.08), transparent);
  pointer-events: none;
}

.cta h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.15rem);
  margin: 0 0 0.5rem;
  position: relative;
}

.cta p {
  color: var(--text-muted);
  margin: 0 auto var(--title-to-content);
  position: relative;
  font-size: 0.9375rem;
  line-height: 1.55;
  max-width: 32rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  position: relative;
}

.footer {
  padding: 1.1rem var(--page-x) 1.35rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

/* 右侧悬浮 Telegram 客服（链接上线后替换 href） */
.fab-telegram {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right, 0px));
  bottom: max(1.15rem, env(safe-area-inset-bottom, 0px));
  z-index: 150;
  width: 3.1rem;
  height: 3.1rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(160deg, #37aee2, #1e96c8);
  box-shadow: 0 4px 22px rgba(30, 150, 200, 0.45);
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.fab-telegram:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 28px rgba(30, 150, 200, 0.55);
}

.fab-telegram:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.fab-telegram__icon {
  width: 1.55rem;
  height: 1.55rem;
  margin-left: 1px;
  margin-top: 1px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal[data-reveal]:nth-child(1) {
  transition-delay: 0s;
}
.reveal[data-reveal]:nth-child(2) {
  transition-delay: 0.06s;
}
.reveal[data-reveal]:nth-child(3) {
  transition-delay: 0.12s;
}
.reveal[data-reveal]:nth-child(4) {
  transition-delay: 0.18s;
}

.nav a.is-active {
  color: var(--text) !important;
  font-weight: 600;
}

/* —— 定价页 —— */
.page-hero {
  position: relative;
  min-height: auto;
  padding: 7.5rem 6vw 3.5rem;
  overflow: hidden;
}

.page-hero .hero-glow {
  top: -10%;
  opacity: 0.8;
}

.page-hero .hero-kicker {
  display: block;
  margin-bottom: 0.75rem;
}

.page-hero .hero-title {
  max-width: 18ch;
}

.page-hero .hero-lead {
  max-width: 40rem;
  margin-bottom: 0;
}

.pricing-section {
  padding: 0 6vw 5rem;
  position: relative;
  z-index: 1;
}

.pricing-grid {
  display: grid;
  gap: var(--block-gap);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 1100px;
  margin: 0 auto;
  align-items: stretch;
}

.pricing-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 720px;
}

.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.2rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(12px);
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.price-card:hover {
  border-color: rgba(52, 211, 153, 0.2);
  transform: translateY(-2px);
}

.price-card--featured {
  border-color: rgba(52, 211, 153, 0.32);
  box-shadow: 0 0 0 1px rgba(52, 211, 153, 0.1), 0 24px 50px -24px rgba(0, 0, 0, 0.55);
  z-index: 1;
}

@media (min-width: 901px) {
  .price-card--featured {
    padding-top: 1.5rem;
    padding-bottom: 1.35rem;
  }
}

.price-card-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  color: #042f1e;
  background: linear-gradient(135deg, #5eead4, var(--accent));
}

.price-limited-tag {
  display: inline-block;
  align-self: flex-start;
  margin-bottom: 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.4rem 0.55rem;
  border-radius: 8px;
  color: #422006;
  background: linear-gradient(135deg, #fde68a, #fbbf24);
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.35);
}

.price-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 0.65rem;
  padding-right: 0;
}

.price-card .price-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  min-height: 2.75em;
}

.price-amount {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: 0.5rem;
}

.price-amount--usdt {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65rem 0.85rem;
  margin-bottom: 0.25rem;
}

.price-amount--usdt .price-was {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(148, 163, 184, 0.55);
  letter-spacing: 0.02em;
  opacity: 0.88;
}

.price-amount--usdt .price-was-num {
  font-variant-numeric: tabular-nums;
}

.price-amount--usdt .price-was-cur {
  font-size: 0.8125rem;
  font-weight: 500;
  opacity: 0.9;
}

.price-amount--usdt .price-now {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.15rem 0.35rem;
}

.price-amount--usdt .num {
  font-size: 2.15rem;
}

.price-amount--usdt .unit-usdt {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.price-amount .cur {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-muted);
}

.price-amount .num {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, var(--cyan), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.price-amount .unit {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
}

.price-amount .sub {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: block;
  margin-top: 0.5rem;
  line-height: 1.4;
}

.price-amount--custom {
  display: block;
  margin-bottom: 0.25rem;
}

.price-amount--custom .price-label {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.price-amount--custom .sub {
  margin-top: 0.75rem;
}

.price-cta {
  display: block;
  text-align: center;
  margin: 1.1rem 0 0;
  padding: 0.65rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(15, 23, 42, 0.45);
  transition: border-color 0.2s, background 0.2s, color 0.2s, transform 0.2s var(--ease-out);
}

.price-cta:hover {
  border-color: rgba(52, 211, 153, 0.35);
  color: var(--accent);
  background: var(--accent-dim);
}

.price-cta--primary {
  border: none;
  color: #042f1e;
  background: linear-gradient(135deg, #5eead4, var(--accent));
  box-shadow: 0 8px 28px -6px rgba(52, 211, 153, 0.4);
}

.price-cta--primary:hover {
  color: #042f1e;
  box-shadow: 0 12px 32px -6px rgba(52, 211, 153, 0.5);
  transform: translateY(-1px);
}

ul.price-features {
  list-style: none;
  margin: 0;
  padding: 0.75rem 0 0;
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-muted);
  flex: 1 1 auto;
}

ul.price-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.45rem 0;
}

ul.price-features li::before {
  content: "";
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.1rem;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2334d399' stroke-width='2'%3E%3Cpath d='M20 6L9 17l-5-5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")
    center / contain no-repeat;
}

.pricing-faq {
  max-width: 36rem;
  margin: 1.5rem auto 0;
  padding: 0 var(--page-x);
  position: relative;
  z-index: 1;
}

.pricing-faq h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 1.25rem;
  text-align: center;
}

#faq .flow-inner > .section-title {
  margin-bottom: 0.5rem;
}

#faq .flow-inner > .section-title + .faq-list {
  margin-top: var(--title-to-content);
}

.faq-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.faq-list dt,
.faq-list dd {
  margin: 0;
  padding: 0;
}

.faq-list dt {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  padding: 0.75rem 1rem 0.25rem;
}

.faq-list dd {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.55;
  padding: 0 1rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

.faq-list .faq-item:last-child dt {
  padding-top: 0.85rem;
}

.faq-list .faq-item:last-child dd {
  border-bottom: none;
  padding-bottom: 0.85rem;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--accent);
}

.footer-sep {
  color: var(--border);
  margin: 0 0.4rem;
}

.footer-copy {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--text-muted);
}

/* —— 窄屏：与手机 UA 共用纵向节奏（小窗 / 平板竖屏也有均匀留白） —— */
@media (max-width: 768px) {
  :root {
    /* 手机侧栏略加宽，顶栏与首屏不贴边 */
    --page-x: max(1.28rem, 6vw);
    --section-y: clamp(2.05rem, 6vw, 2.75rem);
    --block-gap: clamp(0.85rem, 2.4vw, 1rem);
    --title-to-content: clamp(0.9rem, 2.6vw, 1.15rem);
    /* 固定顶栏占位：北单对冲～按钮区在首屏内垂直居中且不压顶栏 */
    --hero-nav-clearance: max(5.5rem, calc(3.85rem + env(safe-area-inset-top, 0px)));
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .pricing-grid,
  .pricing-grid--two {
    grid-template-columns: 1fr;
    max-width: none;
    width: 100%;
  }

  .nav-skip-sm {
    display: none;
  }

  .nav-links {
    gap: 0.65rem;
  }

  .nav-links a {
    font-size: 0.8125rem;
  }

  .nav-cta {
    padding: 0.45rem 0.8rem;
    white-space: nowrap;
  }

  .nav {
    padding-top: max(1rem, env(safe-area-inset-top, 0px));
    padding-bottom: 1rem;
    padding-left: max(var(--page-x), calc(0.35rem + env(safe-area-inset-left, 0px)));
    padding-right: max(var(--page-x), calc(0.35rem + env(safe-area-inset-right, 0px)));
  }

  /* 手机首屏：整屏高度 + 主文案块垂直居中（顶栏已用 padding 留出空隙） */
  .hero {
    box-sizing: border-box;
    min-height: 100vh;
    min-height: 100dvh;
    min-height: 100svh;
    justify-content: center;
    align-items: center;
    padding-top: var(--hero-nav-clearance);
    padding-right: max(var(--page-x), env(safe-area-inset-right, 0px));
    padding-bottom: max(1.75rem, calc(1.1rem + env(safe-area-inset-bottom, 0px)));
    padding-left: max(var(--page-x), env(safe-area-inset-left, 0px));
  }

  .hero-title {
    max-width: none;
    font-size: clamp(1.75rem, 8vw, 2.65rem);
    margin-bottom: 0.5rem;
  }

  .hero-title-line3 {
    white-space: nowrap;
  }

  .hero-eyebrow {
    font-size: clamp(1.35rem, 7vw, 2.05rem);
    letter-spacing: 0.12em;
    margin-bottom: 0.4rem;
  }

  .hero-lead {
    font-size: 0.9375rem;
    margin-bottom: clamp(0.75rem, 2.8vw, 1rem);
  }

  .hero-mobile-hint {
    display: block;
    margin-top: clamp(0.65rem, 2vw, 0.85rem);
    padding: 0 0.25rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 22rem;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    touch-action: manipulation;
  }

  .section {
    padding-right: max(var(--page-x), env(safe-area-inset-right, 0px));
    padding-left: max(var(--page-x), env(safe-area-inset-left, 0px));
  }

  .section-title {
    font-size: clamp(1.35rem, 5.2vw, 1.9rem);
  }

  .section-sub {
    font-size: 0.875rem;
  }

  .card {
    padding: 1.15rem 1.05rem;
  }

  .cta {
    padding-right: max(var(--page-x), env(safe-area-inset-right, 0px));
    padding-left: max(var(--page-x), env(safe-area-inset-left, 0px));
    padding-bottom: max(var(--section-y), env(safe-area-inset-bottom, 0px));
  }

  .cta p {
    font-size: 0.9375rem;
    max-width: 22rem;
  }

  .cta-actions {
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 22rem;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-actions .btn {
    width: 100%;
    max-width: 22rem;
    min-height: 48px;
    touch-action: manipulation;
  }

  .price-card {
    padding: 1.15rem 1.05rem 1.05rem;
  }

  .price-amount--usdt {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem 0;
  }

  .price-amount--usdt .num {
    font-size: clamp(1.75rem, 8.5vw, 2.35rem);
  }

  .price-cta {
    width: 100%;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
  }

  .faq-list dt {
    font-size: 0.875rem;
    padding: 0.95rem 1rem 0.35rem;
  }

  .faq-list dd {
    font-size: 0.875rem;
    padding: 0 1rem 1rem;
    line-height: 1.6;
  }

  .faq-list .faq-item:last-child dd {
    padding-bottom: 1rem;
  }

  .footer {
    padding-top: var(--section-y);
    padding-bottom: max(var(--section-y), env(safe-area-inset-bottom, 0px));
    padding-right: max(var(--page-x), env(safe-area-inset-right, 0px));
    padding-left: max(var(--page-x), env(safe-area-inset-left, 0px));
  }

  .fab-telegram {
    bottom: max(1.25rem, calc(env(safe-area-inset-bottom, 0px) + 0.5rem));
  }
}

/* —— 手机 UA：与窄屏规则叠加；单列定价 + 安全区 + 纵向节奏变量 —— */
html.device-mobile {
  --page-x: max(1.28rem, 6vw);
  --section-y: clamp(2.2rem, 6.2vw, 2.9rem);
  --block-gap: clamp(0.9rem, 2.5vw, 1.05rem);
  --title-to-content: clamp(1rem, 2.8vw, 1.2rem);
  --hero-nav-clearance: max(5.5rem, calc(3.85rem + env(safe-area-inset-top, 0px)));
}

html.device-mobile .nav-skip-sm {
  display: none;
}

html.device-mobile .nav {
  padding-top: max(1rem, env(safe-area-inset-top, 0px));
  padding-right: max(var(--page-x), calc(0.35rem + env(safe-area-inset-right, 0px)));
  padding-bottom: 1rem;
  padding-left: max(var(--page-x), calc(0.35rem + env(safe-area-inset-left, 0px)));
}

html.device-mobile .nav-links {
  gap: 0.6rem;
}

html.device-mobile .nav-links a {
  font-size: 0.8125rem;
}

html.device-mobile .nav-cta {
  padding: 0.45rem 0.8rem;
  white-space: nowrap;
}

html.device-mobile .hero {
  box-sizing: border-box;
  min-height: 100vh;
  min-height: 100dvh;
  min-height: 100svh;
  justify-content: center;
  align-items: center;
  padding-top: var(--hero-nav-clearance);
  padding-bottom: max(1.75rem, calc(1.1rem + env(safe-area-inset-bottom, 0px)));
}

html.device-mobile .hero-title {
  font-size: clamp(1.75rem, 8.2vw, 2.65rem);
  margin-bottom: 0.5rem;
}

html.device-mobile .hero-title-line3 {
  white-space: nowrap;
}

html.device-mobile .hero-eyebrow {
  font-size: clamp(1.4rem, 7.5vw, 2.15rem);
  letter-spacing: 0.14em;
  margin-bottom: 0.4rem;
}

html.device-mobile .hero-lead {
  margin-bottom: clamp(0.75rem, 2.8vw, 1rem);
}

html.device-mobile .hero-mobile-hint {
  display: block;
  margin-top: clamp(0.65rem, 2vw, 0.85rem);
  padding: 0 0.25rem;
}

html.device-mobile .pricing-grid,
html.device-mobile .pricing-grid--two {
  grid-template-columns: 1fr;
  max-width: none;
  width: 100%;
}

html.device-mobile .grid-3 {
  grid-template-columns: 1fr;
}

html.device-mobile .section-sub {
  margin-bottom: var(--title-to-content);
}

@media (max-width: 380px) {
  .hero-title-line3 {
    white-space: normal;
  }

  html.device-mobile .logo {
    font-size: 1rem;
    letter-spacing: 0.04em;
    gap: 0.4rem;
  }

  html.device-mobile .logo-mark {
    width: 1.45rem;
    height: 1.45rem;
    border-radius: 5px;
  }

  html.device-mobile .nav-links {
    gap: 0.45rem;
  }

  html.device-mobile .nav-links a {
    font-size: 0.75rem;
  }

  html.device-mobile .nav-cta {
    padding: 0.4rem 0.65rem;
    font-size: 0.75rem;
  }
}

/* 桌面：与全局 .cta / .footer / .flow-inner 同列宽（须写在对应基础规则之后） */
@media (min-width: 769px) {
  .flow-inner {
    max-width: 42rem;
  }

  .cta,
  .footer {
    padding-left: max(var(--page-x), calc((100vw - 70rem) / 2 + 1rem));
    padding-right: max(var(--page-x), calc((100vw - 70rem) / 2 + 1rem));
  }
}